Let X={1,2,3,...,10}. Define a relation on X × X by (a, b) R (c, d) if ad=bc.

List one member each equivalence class of X × X.

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work